Earth from Space - Image Information


	Image Information

Display a Screen Layout for Printing


			Photo #: ISS009-E-12441 Date: Jun. 2004 Geographic Region: EGYPT Feature: GEBEL EDMONSTONE, DUNES



	Gebel (or Mount) Edmonstone is a flat-topped mesa located near the Dahkla Oasis south of Cairo, Egypt. The Oasis is a historically important meeting place of several trade routes connecting different regions of Egypt and Sudan. Gebel Edmonstone is a remnant of an eroding scarp that extends for over 200 kilometers (125 miles) east-southeast to west-northwest (visible in the upper left corner of the image). The flat caprock of both the scarp and Mount Edmonstone is chalky limestone underlain by fossil-bearing shale and fine-grained sedimentary rocks. Digital astronaut photographs can be processed in similar fashion to other multispectral remotely sensed data to maximize information content. This astronaut photograph has been "stretched" to enhance color variations in the various rock and soil units. The color variations reflect differences in composition (or weathering) of the various rock units. The limestone unit capping Gebel Edmonstone and the adjacent scarp ranges from white to gray in color, while the underlaying fine-grained sedimentary layers are blue-gray. Hillslope pathways for sediment movement downslope are clearly visible as brown to tan streamers originating from Gebel Edmonstone. Barchan dune fields are also visible in this color-enhanced image, and are distinct due to their mineralogical composition. Evaporite deposits are bright white, while vegetated portions of the Oasis--mostly agricultural fields--are dark blue-black. This additional information obtained from image enhancement can be used for geologic mapping and investigation of surficial processes operating in the region.

Images:	All Available Images Low-Resolution 297k
Mission:	ISS009
Roll - Frame:	E - 12441
Geographical Name:	EGYPT
Features:	GEBEL EDMONSTONE, DUNES
Center Lat x Lon:	25.6N x 28.7E
Film Exposure:		N=Normal exposure, U=Under exposed, O=Over exposed, F=out of Focus
Percentage of Cloud Cover-CLDP:	10
Camera:	E4
Camera Tilt:	13	LO=Low Oblique, HO=High Oblique, NV=Near Vertical
Camera Focal Length:	400
Nadir to Photo Center Direction:	SW	The direction from the nadir to the center point, N=North, S=South, E=East, W=West
Stereo?:		Y=Yes there is an adjacent picture of the same area, N=No there isn't
Orbit Number:	3852
Date:	20040618	YYYYMMDD
Time:	120050	GMT HHMMSS
Nadir Lat:	26.0N	Latitude of suborbital point of spacecraft
Nadir Lon:	29.3E	Longitude of suborbital point of spacecraft
Sun Azimuth:	271	Clockwise angle in degrees from north to the sun measured at the nadir point
Space Craft Altitude:	194	nautical miles
Sun Elevation:	63	Angle in degrees between the horizon and the sun, measured at the nadir point
Land Views:	DUNE
Water Views:	SEDIMENT
Atmosphere Views:
Man Made Views:
City Views:

Photo is not associated with any sequences

NASA
Home Page

JSC
Home Page

JSC Digital
Image Collection

Earth Science &
Remote Sensing

This service is provided by the International Space Station program and the JSC Earth Science & Remote Sensing Unit, ARES Division, Exploration Integration Science Directorate.